(19)
(11) EP 0 311 089 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.04.1990 Bulletin 1990/15

(43) Date of publication A2:
12.04.1989 Bulletin 1989/15

(21) Application number: 88116620.1

(22) Date of filing: 07.10.1988
(51) International Patent Classification (IPC)4: G11B 23/087, G11B 23/03
(84) Designated Contracting States:
DE GB

(30) Priority: 08.10.1987 JP 252353/87
09.11.1987 JP 282768/87
11.11.1987 JP 282951/87
14.03.1988 JP 61691/88

(71) Applicant: Hitachi Maxell Ltd.
Osaka-fu (JP)

(72) Inventors:
  • Mizutani, Hikaru
    Minoo-shi Osaka-fu (JP)
  • Wakai, Kunio
    Kitasouma-gun Ibaraki-ken (JP)
  • Fujiwara, Hideo
    Kitasouma-gun Ibaraki-ken (JP)
  • Niimi, Hideaki
    Tsuchiura-shi Ibaraki-ken (JP)
  • Isoe, Noboru
    Toride-shi Ibaraki-ken (JP)
  • Doi, Toshio
    Tama-shi Tokyo (JP)

(74) Representative: Selting, Günther, Dipl.-Ing. et al
Patentanwälte von Kreisler, Selting, Werner Postfach 10 22 41
50462 Köln
50462 Köln (DE)


(56) References cited: : 
   
       


    (54) An arrangement for preventing entrance of harmful particles for use in a cartridge


    (57) In a recording tape cartridge having a cartridge case, magnetic recording tape (2) and a front lid and a rear lid (11) for protecting the magnetic tape (2), there are provided en­trance preventing members (50) at a bottom the cartridge case facing to clearances between side edges of the rear lid (11) and case body for preventing entrance of floating harmful particles into the area near the recording tape so as to preventing corrosion of the recording tape by the floating harmful particles.







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